Inking apparatus for printing-presses



(No' Model.) 2 Sheets-Sheet 1 J. THOMSON. INKING APPARATUS FOR PRINTING PRESSES.

No. 427,450. Patented May 6, 1890;

IIIIIIHIHIII 'L'L.

llllllllll lllllllllIlllIIHIIIIIllllllIIIIHIIIIIIIIIIJIIH! WWW @w w M23:

(No Model.) I 2 Sheets-Sheet 2.

J. THOMSON. INKING APPARATUS FOR PRINTING DRESSES.

No. 427,450 Patented May 6, 1890.

( I lllllllliIEIIIIIIllllllllllllllllllllllllIIlllhlnlllll |mm||Il!!!!!!!!!! lllIHllll Illlllllllillil?" UNITED STATES ,ArnNr tribe.

7 JOHN THOMSON, OF BROOKLYN, NEIV YORK.

INKING APPARATUS FOR PRINTING -PRESSES.

- SPECIFICATION forming part of Letters Patent No. 427,450, dated May 6, 1890.

Application filed March 14:, 1890. Serial 110,343,901. (N0 model.)

To all whom, it may concern:

Be it known that I, JOHN THOMSON, a citizen of the United States, residing in the city of Brooklyn, Kings county, State of New York, have invented certain new and useful Improvements in Inking Apparatus for Job llaten Printing-Presses, of which the follow- 1ng is a specification.

This invention relates to improvements in the inking apparatus of job platen printingpresses, and the objects thereof are to substitute positive action for springs; to obtain more perfect movement .in the form-inking rollers; to increase the ink-carryin g capacity, the ink distribution, and the speed, and also to add to the convenience and efficiency of the inking devices of such presses.

In the drawings, Figure I is a side elevation of a press embodying my invention. Fig. 2 is a detached enlarged side detail view of the carriage and carriage-way. Fig. 3 is a front elevation developed from Fig. 2; and Fig. 4: is a detail view of adjustingnnt and rider-bearing,

The following specification will be strictly confined to the immediate improvement upon the presumption that the state of the art is too well established to require antecedent eX- planation.

The carriage is comprised of the right and left hand frame castings 60, in which are mounted sliding boxes 61 for receiving the journals of the stocks of the form-inking rollers 62 and the upper and lower tie-rods 63. Upon studs projecting inwardly from the inner side of each frame-casting are mounted two friction-rollers, lower 64: and upper 65, both of which are adapted to engage the slot or cam 66 in the outer side of the carriageways 67,,and which guide and control the movement of the carriage, which is presumed to be reciprocated by the usual meaussuch, for instance, as a cam in the gear 13 acting upon the cam-lever 6S and through its connections to a rock-shaft, thence to the arms 09 and pivoted connections 7 O to the carriage. In the press here illustrated the ink is primarily distributed by a revolving and reciprocating main ink-cylinder, as 71, the actuating-gear being on the left-hand side (viewed front) and within the left-hand cari y. In fact the cylinder is mounted upon a shaft having bearings, as 7 2, in each of the carriage-ways.

The first part of my improvement refers to the mode of mounting the carriage journalboxes and the function of the extension springs 7 Hcretofore these springs have acted directly between the frame-casting to the confining-washer Tl and rod 7 5, thence to the journal-box and form-roller, thrusting the form-roller inward until stopped by its impact against the form, or by the usual form-roller wheels or trucks against the faces of both carriage-ways; but by applying to the tapped lugs or flanges of the frame-castings the ad just-ing-sleeves 7G, threaded at one end and squared at the other for a wrench, through which freely pass the rods of the boxes, the condition of operation is thereby changed, the springs now exerting their en tire tension to bring the boxes into direct contact with the sleeves. By turning these sleeves the length and tension of the springs are not altered, the single effect being to positively carry the boxes, and with them the for1n-rollers,to or from the form; hence any desired adjustment may be obtained to increase or decrease the intensity of the rollers upon the form. In this wise the rollers are not required to constantly turn against the friction due to the entire thrust of the springs. This also relieves the friction-rollers of such thrust, the strain of the springs being se1f-contained within the frame-casting only, instead of acting between the frame-casting and the carriage-way, while finally the springs yet permit ready partial withdrawal of the boxes to remove the rollers and present an elastic tension between the rollers and the form. Such an arrangement of the boxes leads to the second part of the improvement, consisting in dispensing with all roller wheels or trucks, for by removing the composition from the left-hand side of the stocks, as at 77, to clear the gearing, but extending it across the face of the carriage-way on the right-hand side, as at 78, the ends of the rollers are themselves thus utilized to initiate the act of revolution before impacting upon the form. The foregoing is also merged in or is a component to the third part of this invention, which relates to the face of the right-hand carriage-way. This is a separate strip 79, secured to the ICO carriage-way by screws. The thickness of this strip is such that when secured directly to the carriage-way its face is about one-sixteenth of an inch less than the usual standard of type-high. Then by simply inserting thin pieces of metal or paper the strip may be quickly, accurately, and firmly packed up to effect, in connection with the adjustingsleeves, any desired intensity of contact upon the form, or to be adapted to types of different countries or for different diameters of rollers or to varying diameters due to shrinkage, &c.

The fourth part hereof refers 'to the third or upper roller 80. This is a feed-roller or rider, which both takes its supply and returns it again to the upper form-roller. It is mounted in separate bearing-pieces 81, each being secured, like a swivel, to an adjustingsleeve 82, the latter screwed within a threaded bearing in the frame-casting vertically to the axis of the form-roller. Consequently, when these sleeves are turned down, the rider is securely locked to its position, and can only be removed by entirely unscrewing the sleeves; but the necessity for such removal is by this construction avoided, for by a slight adjustment of the sleeves the rider may either be carried out of contact with the form-roller or brought into action, as the work may require in either instance. This rider may be made from a light tube, the inclosed ends forming the journals.

Part five refers to bringing the form-rollers into contact with the main ink-cylinder to receive their supply of ink, and this is effected positively by forming the upper extensions of the side slots or cams in the carriage-ways to a circular are, as 83, the relation thereof with respect to the carriage friction-rollers being such that the upper friction-rollers only shall enter this curved section; hence the earriage will be vibrated upon the lower frictionrollers, which can only reciprocate vertically, like a hinge, and the form-inking rollers will be swung over upon the cylinder in the most desirable manner without shock or jar. Neither will the character of such contact be such as to thereby greatly increase the :friction of operation, nor will there be so great liability to melt the composition. 1

A positive step is provided to the upward movement of the carriage by the bosses Sat of the carriage-ways, which act against the upper rod of the carriage. These bosses substitute the ordinary stop-screws and afford a ready and accurate means of adjustment by filing out in an obvious manner.-

The dot ted outline indicates the position of theform-rollers upon the cylinder, and shows how, by adjustment of the bosses, they may be impressed to obtain any degree of contact to secure the best effects in ink-distribution. The additional dotted outline 80 also shows an important advantage due to the positive action of the curve in swinging the carriage,

as by this it is shown that by simply starting the carriage off the cylinder the rollers are suspended entirely free of contact, either with the cylinder or the carriage-ways, the advantages of which are twofold: first, the press may be left standing without having to remove either the rollers or the form, as in this position the composition will not flatten, and, secondly, as the carriage is started downward the rollers are free to rotate at the speed imparted by the cylinder; hence they are not started from a state of rest when first striking the face of the carriage-way.

1. In a job platen printing-press, the combination, with the carriage frame, of the spring-actuated j ournal-boxes and adj ustingsleeves, substantially as described.

2. In a job platen printing-press, the combination of the form-roller journal-boxes, journal-box rods, springs, adjusting-sleeves, and carriage-frame castings, constructed and arranged substantially as and for the purpose specified.

3.. In a job platen printing-press, the combin ation, with the carriage and carriage-ways, of form-inking rollers, the ends of which are cut away at one side to free the gearing and the carriage-way, but the other ends of sa (1 rollers being extended over and adapted to bear upon the face of the opposite carriageways, substantially as and for the purpose specified.

4. In a job platen printing-press, the combination, with one of the carriage-ways and the form-inking rollers mounted in adjustable earriage-bearin gs and having the composition cut away on one side and projecting over the carriage-Way on the other, of the adj ustablc strip 7 9, substantially as and for the purpose described.

5. The swiveled bearing-pieces mounted in the threaded sleeves screwed to the carriage, for the purpose of carrying the auxiliary feed roll or rider, substantially as and for the purpose specified.

6. The combination, with the main ink-cylinder, form-rollers, carriage, and carriage-friction rollers, of the carriage-ways in which the upper portion of the guiding slots or cams are curved, the form and construction being such that the upper friction-rollers only enter the said curved portion, whereby the carriage is swung upon the lower friction-rollers as an axis, and the form-inking rollers are brought into contact with the cylinder, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JOHN THOMSON.

Witnesses:

Enw. K. ANDERTON, J oHN MCKINNON. 

